'Angel of God' in the Bible

The angel of God said to him, “Take the meat and the unleavened bread and lay them on this rock, and pour out the broth.” And he did so.

Then the woman came and told her husband, saying, “A man of God came to me and his appearance was like the appearance of the angel of God, very awesome. And I did not ask him where he came from, nor did he tell me his name.

God listened to the voice of Manoah; and the angel of God came again to the woman as she was sitting in the field, but Manoah her husband was not with her.